package netty.websocket;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;

import java.time.LocalDateTime;

/**
 * TextWebSocketFrame: 文本帧
 */
public class MyTextWebSocketFrameHandler extends SimpleChannelInboundHandler<TextWebSocketFrame> {
    @Override
    protected void channelRead0(ChannelHandlerContext ctx, TextWebSocketFrame msg) throws Exception {
        System.out.println("服务器接收到消息 " + msg.text());
        // 回复消息
        ctx.channel().writeAndFlush(new TextWebSocketFrame("服务器回复: " + LocalDateTime.now() + " " + msg.text()));
    }

    @Override
    public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
        System.out.println(ctx.channel().id().asLongText() + " 上线~");
    }

    @Override
    public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {
        System.out.println(ctx.channel().id().asLongText() + " 下线");
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        System.out.println("发生异常: " + cause.getMessage());
        ctx.channel().close();
    }
}
